1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
34 /*-
142 static volatile sig_atomic_t wresized;	/* Tty resized, when non-zero. */
171 	fprintf(stderr, "usage: iostat [-CdhIKoTxz] [-c count] [-M core]"  in usage()
172 		" [-n devs] [-N system]\n"  in usage()
173 		"\t      [-t type,if,pass] [-w wait] [drives]\n");  in usage()
201 	while ((c = getopt(argc, argv, "Cc:dhIKM:N:n:oTt:w:xz")) != -1) {  in main()
266 	argc -= optind;  in main()
275 		if (kvm_nlist(kd, namelist) == -1)  in main()
282 	 * the user of his mistake.  in main()
289 	 * greater than 0, they may be 0 or non-zero.  in main()
334 	if (devstat_getdevs(kd, &cur) == -1)  in main()
337 	num_devices = cur.dinfo->numdevs;  in main()
338 	generation = cur.dinfo->generation;  in main()
341 	 * If the user specified any devices on the command line, see if  in main()
358 		specified_devices[num_devices_specified - 1] = *argv;  in main()
374 	 * or 1.  If we get back -1, though, there is an error.  in main()
378 			       cur.dinfo->devices, num_devices, matches,  in main()
381 			       hflag) == -1)  in main()
391 		/* Let the user know he goofed, but keep going anyway */  in main()
404 			count = -1;  in main()
408 	 * If the user specified a count, but not an interval, we default  in main()
415 	 * If the user specified a wait time, but not a count, we want to  in main()
416 	 * go on ad infinitum.  This can be redundant if the user uses the  in main()
418 	 * already set count = -1 above.  Oh well.  in main()
421 		count = -1;  in main()
434 	 * If the user stops the program (control-Z) and then resumes it,  in main()
460 	 * Register a SIGALRM handler to implement sleeps if the user uses the  in main()
461 	 * -c or -w options  in main()
502 		if (!--headercount) {  in main()
523 		case -1:  in main()
529 			num_devices = cur.dinfo->numdevs;  in main()
530 			generation = cur.dinfo->generation;  in main()
535 						    cur.dinfo->devices,  in main()
543 			case -1:  in main()
562 		 * We only want to re-select devices if we're in 'top'  in main()
563 		 * mode.  This is the only mode where the devices selected  in main()
572 						    cur.dinfo->devices,  in main()
580 			case -1:  in main()
596 			cur.tk_nin -= last.tk_nin;  in main()
599 			cur.tk_nout -= last.tk_nout;  in main()
603 		etime = cur.snap_time - last.snap_time;  in main()
610 			cur.cp_time[i] -= last.cp_time[i];  in main()
628 		if ((count >= 0 && --count <= 0) || return_requested)  in main()
703 		if (status == -1 && errno == EINTR)  in doresize()
705 		else if (status == -1)  in doresize()
708 			wrows = w.ws_row - 3;  in doresize()
727 	 * If xflag is set, we need a per-loop header, not a page header, so  in phdr()
737 		if ((dev_select[i].selected != 0)  in phdr()
738 		 && (dev_select[i].selected <= maxshowdevs)) {  in phdr()
741 					    cur.dinfo->devices[di].device_name,  in phdr()
742 					    cur.dinfo->devices[di].unit_number);  in phdr()
759 		if ((dev_select[i].selected != 0)  in phdr()
760 		 && (dev_select[i].selected <= maxshowdevs)) {  in phdr()
826 		if (((perf_select == 0) && (dev_select[dn].selected == 0))  in devstats()
827 		 || (dev_select[dn].selected > maxshowdevs))  in devstats()
832 		if (devstat_compute_statistics(&cur.dinfo->devices[di],  in devstats()
833 		    havelast ? &last.dinfo->devices[di] : NULL, etime,  in devstats()
862 			if ((dev_select[dn].selected == 0)  in devstats()
863 			 || (dev_select[dn].selected > maxshowdevs))  in devstats()
868 			int block_size = cur.dinfo->devices[di].block_size;  in devstats()
875 			    cur.dinfo->devices[di].device_name,  in devstats()
876 			    cur.dinfo->devices[di].unit_number) == -1)  in devstats()
887 					printf("%-8.8s %7.0Lf %7.0Lf %8.1Lf "  in devstats()
900 					printf("%-8.8s %11.1Lf %11.1Lf "  in devstats()
1017 		if (sysctlbyname(name, ptr, &nlen, NULL, 0) == -1) {  in readvar()